Bonding and fluxional behaviour of N,N′-Di-p-tolylformamidino- and 1,3-dip-tolyltriazenido complexes of palladium(II) and platinum(II)

Article abstract of DOI:10.1016/S0020-1693(00)91097-1

The fluxionality of M(PPh₃)₂Cl(ArNXNAr) and trans-Pt(PPh₃)₂H(ArNNNAr) (M = palladium(II), platinum(II); Ar = p-CH₃C₆H₄; X = CH, N) is discussed on the basis of ¹H n.m.r., X-ray, and i.r. studies. The stereochemically non-rigid process is proposed as occuring via a pseudo penta-coordinated intermediate having both nitrogen atoms σ facing the metal through two electron lone pairs. A different mechanisms via a π-bonding component in the M-(nitrogen ligand) bond is also discussed.